Mercedes-Benz VISION EQXX

Mercedes-Benz VISION EQXX

The all-electric Mercedes-Benz VISION EQXX has a driving range of more than 1,000 kilometres (620 miles) on a single charge.

The battery pack in the VISION EQXX holds almost 100 kWh of energy, yet has 50% less volume and is 30% lighter than the pack in the Mercedes-Benz EQS. The gross vehicle weight of the VISION EQXX is around 1,750 kg.

The VISION EQXX also has a drag coefficient of just cd 0.17, and 95% efficiency, ie. up to 95% of the energy from the battery ends up at the wheels – compared to just 30% from even the most efficient ICE drivetrain.

The efficiency is achieved due to a number of innovations, including ultra-low rolling resistance tyres and lightweight magnesium wheels, lightweight brake discs made from aluminium alloy, and a chassis with a lightweight F1 subframe.

The efficiency of the electric drive unit means it generates only minimal waste heat which helps to keep the thermal management system extremely small and lightweight. 

A cooling plate is installed in the vehicle floor, enabling it to take advantage of the air flowing along the underside of the VISION EQXX. This is the most aerodynamically efficient way of keeping the electric drive unit cool under normal conditions, allowing the vehicle to gain about 20 kilometres of range in the most aerodynamic mode.

A heat pump in the VISION EQXX sucks up heat generated by the drive system and from the ambient air outside to heat the cabin.

The electric system that powers many of the ancillaries in the VISION EQXX draws additional energy from 117 solar cells on the roof. On a single day and under ideal conditions, this can add up to 25 km of range on long-distance journeys.

The solar energy is stored in a lightweight lithium-iron-phosphate battery, which supplies a climate blower, the lights, the infotainment system and other ancillaries. Mercedes-Benz and its partners are working towards using solar power to charge the high-voltage system.

On a regular long-distance drive, a typical electric vehicle dedicates almost two-thirds of its battery capacity to cutting its way through the air ahead, which is why the VISON EQXX has a drag coefficient of just 0.17. A reduction of just 0.01 adds around 2.5% to the range. There’s a small frontal area and tyres with aerodynamically optimised sidewalls to match the covers mounted on the 20-inch, lightweight, forged-magnesium wheels.

The VISION EQXX uses less than 10 kWh of electrical energy to travel 100 km. That equates to traveling 6 miles on 1 kWh of electrical energy. Translated into fossil-fuel consumption, this is around 1 litre per 100 kilometres (235 mpg U.S. or 282 mpg UK).

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